I’msorrytoinformyouthatwewillbedelayedforabout30minutesdueto（）.
A.waiting for passengers
B.operational problems
C.badweather condition
D.air traffic control
正確答案：badweather condition
題目：I’msorrytoinformyouthatwewillbedelayedforabout30minutesdueto（）.
關鍵字：智慧樹
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